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Mobile OS Interview Questions
Questions Answers Views Company eMail

What’s the difference between an “app id” and a “bundle id” and what is each used for?

 491

What is a category and when is it used?

 506

What are “strong” and “weak” references? Why are they important and how can they be used to help control memory management and avoid memory leaks?

 431

What are the limits of accessibility ?

 472

Explain the characteristics of ios?

 456

Explain place holder constraint

 434

Explain differences between foundation and corefoundation

 482

What is auto-layout?

 527

What is the difference between let and var in swift?

 488

What is the difference between atomic and non-atomic properties? Which is the default for synthesized properties? When would you use one over the other?

 423

Explain the difference between copy and retain?

 553

What is the difference between synchronous & asynchronous task ?

 441

Why do you generally create a weak reference when using self in a block?

 485

what’s accessibilityhint?

 477

What is made up of nserror object?

 461

Un-Answered Questions { Mobile OS }

how to create a service with single thread?

519

Do you know what are layer objects and what do they represent?

472

What is a sticky broadcast? Give an example.

535

What does android 9 pie do?

485

Is ubuntu owned by microsoft?

391




What three types of navigation styles are used in ios?

419

What is final class in swift?

540

What is optional chaining?

473

What is mvc in ios swift?

434

What is meaning of 'assign' keyword?

514

Which permission needed in order to use mapactivity?

621

What are the different versions of android os that you remember?

560

How do I delete a user account in ubuntu?

400

Assume that your app is running in the foreground but is currently not receiving events. In which sate it would be in?

525

How can we prevent ios 8 app’s streaming video media from being captured by quicktime player on yosemite during screen recording?

442

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